JPH0730761Y2 - Manhole cover - Google Patents
Manhole coverInfo
- Publication number
- JPH0730761Y2 JPH0730761Y2 JP5520490U JP5520490U JPH0730761Y2 JP H0730761 Y2 JPH0730761 Y2 JP H0730761Y2 JP 5520490 U JP5520490 U JP 5520490U JP 5520490 U JP5520490 U JP 5520490U JP H0730761 Y2 JPH0730761 Y2 JP H0730761Y2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- road surface
- wheel
- raised portion
- manhole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
Description
本考案は、マンホール用蓋に係り、特に、降雪地帯の道
路や新設道路に好適なものに関する。The present invention relates to a manhole cover, and more particularly to a manhole cover suitable for a road in a snowfall area or a new road.
従来、降雪地帯の上，下水道等のマンホール用蓋（以
下、蓋という）は、除雪作業時の障害とならないよう
に、路面（舗装面）よりも２〜3cm低く位置している。 すなわち、除雪作業は、凍結防止のために、除雪車のグ
レーダ（スクレーパ）が路面に接して移動し、除雪後に
路面に雪が残らないようにしている。 また、道路新設時においては、路面が沈下することを予
想して、その道路に設けられる蓋の上面よりも高くなる
ように仮舗装がなされている。Conventionally, a lid for a manhole (hereinafter referred to as a lid) such as a sewer on a snowy area is located 2-3 cm lower than a road surface (paved surface) so as not to hinder the snow removal work. That is, in the snow removal work, the grader (scraper) of the snow removal vehicle moves in contact with the road surface to prevent freezing, so that no snow remains on the road surface after snow removal. In addition, when a road is newly constructed, temporary paving is performed so that the road surface is expected to sink and the height is higher than the upper surface of the lid provided on the road.
しかしながら、上記従来の降雪地帯の道路または新設道
路に設けられる蓋の上面は、路面よりも低い位置となっ
ているため、蓋が破損しやすい虞れがあった。 すなわち、蓋の上面が路面より低いため、自動車が通過
すると、その自動車の車輪が蓋上に落下して衝撃を与
え、このような衝撃が繰返されると蓋に金属疲労が起
り、ついにその蓋が破損するという問題点があった。 また、上述の衝撃は、蓋を嵌合しているマンホール枠体
（以下、枠体という）との間に不整合、いわゆるガタを
生じさせ、このようなガタが生じると、自動車の通過の
たびに騒音が発生するという問題点があった。 そこで、本考案は、上記の問題点を解決するためになさ
れたものであって、その目的は、蓋の上面が路面よりも
低い位置にあっても、自動車の車輪の衝撃を受けにくい
ようにした蓋の提供にある。However, since the upper surface of the lid provided on the conventional road in the snowfall area or the new road is located lower than the road surface, the lid may be easily damaged. That is, since the upper surface of the lid is lower than the road surface, when an automobile passes, the wheels of the automobile drop on the lid and give an impact, and when such an impact is repeated, metal fatigue occurs in the lid, and finally the lid is closed. There was a problem of damage. In addition, the above-mentioned impact causes misalignment with the manhole frame (hereinafter, referred to as a frame) in which the lid is fitted, that is, rattling, and if such rattling occurs, each time the vehicle passes. There was a problem that noise was generated. Therefore, the present invention has been made in order to solve the above problems, and its purpose is to prevent the wheels of an automobile from receiving an impact even when the upper surface of the lid is lower than the road surface. It is in the provision of a lid.
本考案に係る蓋は、上記の目的を達成するために、マン
ホール枠体に嵌合されたマンホール用蓋の上面が路面よ
りも低い位置となるように用いられるマンホール用蓋で
あって、前記マンホール用蓋の上面に、前記路面を通過
する自動車の車輪の一部がその路面にあるときにその車
輪の他の一部を受け止めることのできるその路面とほぼ
等しい高さを有する凸起部を設けたことを特徴としてい
る。 また、前記凸起部の断面は台形状を呈していることを特
徴としている。In order to achieve the above object, a lid according to the present invention is a lid for a manhole used so that an upper surface of the lid for a manhole fitted in a manhole frame is lower than a road surface. Provided on the upper surface of the cover is a protrusion having a height substantially equal to the road surface capable of receiving another part of the wheel of the automobile passing through the road surface when the part of the wheel is on the road surface. It is characterized by that. Further, the cross section of the raised portion is trapezoidal in shape.
上記構成において、凸起部は自動車の車輪の一部が路面
にあるとき、その車輪の他の一部を受け止める。 また、断面が台形形状の凸起部は除雪車のグレーダを上
方へ逃がすように作用する。In the above structure, the raised portion receives the other part of the wheel of the automobile when the part of the wheel is on the road surface. Further, the raised portion having a trapezoidal cross section acts so as to allow the grader of the snow plow to escape upward.
以下、本考案の一実施例に係る蓋を図面に基づいて説明
する。 第１図及び第２図は第１の実施例に係る蓋で、第１図は
その縦断面図及び第２図はその平面図である。 蓋１は、鋳鉄製の丸型マンホール用の蓋で、その上面1a
の中央部に断面が台形状を呈し、平面が円形状の凸起部
２が一体に形成されている。 凸起部２の高さは、この蓋１が枠体10に嵌合されたとき
に路面Ｇと同一か、もしくは路面Ｇよりわずかに低くな
るように設定されている。例えば、上面1aが路面Ｇより
も3cm低ければ凸起部２の高さは2.5cmに、また、上面1a
が路面Ｇよりも2cm低ければ凸起部２の高さは1.5cmに設
定される。 上面1aに対する凸起部２の配置は、自動車の車輪Ｗの一
部が路面Ｇに位置しているときに、その車輪Ｗの他の一
部が凸起部２に位置する関係（車輪Ｗの一部が凸起部２
に位置しているときにその車輪Ｗの他の一部が路面Ｇに
位置する関係）にある。要するに、車輪Ｗが路面Ｇ及び
凸起部２に接することなく、上面1aに接することがない
ような配置関係を有している。 本考案者の研究によれば、上述の配置関係は、蓋１の直
径Ｄが600φのとき、その上面1aの中央部に設けられる
凸起部２の直径が少なくとも300φあれば、普通乗用車
の車輪が上面1aに落下することなく蓋１上を通過できる
ことが判明している。もちろん、普通乗用車よりも大径
の大型自動車の車輪は上面1aに接することなく通過する
ことが可能となる。 蓋１の側壁1bは周知の蓋と同様に、枠体10のテーパ付開
口10aに対応した逆円錐に形成されているとともに、そ
の蓋１の裏面には補強リブ1cが一体に設けられている。 枠体１は、周知の枠体と同様に鋳鉄製で路面Ｇの地中に
設けられたコンクリートベースＡ上に固定されている。 本実施例に係る蓋１は、上面1aの中央部に凸起部２を設
けたので、車輪Ｗの一部がまだ路面Ｇに位置していると
きにその車輪Ｗの他の一部をその凸起部２で受け止める
ことができるので、車輪Ｗが上面1aに落下するという現
象が無くなり、その落下に伴う衝撃の発生を未然に防止
することができる。さらに、このような衝撃が防止され
るので、この蓋１上を通過する自動車の振動も抑制され
るので乗り心地を良くするという副次的な効果も得るこ
とができる。 また、凸起部２の縁が台形に形成されているため、例
え、路面Ｇがスパイクタイヤ等で削られて低くなって、
除雪車のグレーダが凸起部２に当接しても、グレーダを
上方へ逃がすことができるので、蓋１の破損を未然に防
止することができる。加えて、凸起部２の縁が台形であ
るため車輪Ｗを傷める虞れがない。 第３図及び第４図は、第２の実施例に係る蓋１′であっ
て、第３図はその平面図及び第４図は第３図のIV-IV線
断面図である。 本実施例に係る蓋１′は、上面1aの中央部に上記第１の
実施例と同様な凸起部2aが設けられているとともに、こ
の凸起部2aの周囲にこの凸起部2aよりも小径の８ケの凸
起部2b,2b…が設けられている。 第５図及び第６図は、第３の実施例に係る蓋１″であっ
て、第５図はその平面図及び第６図は第５図のVI-VI線
断面図である。 本実施例に係る蓋１″は、上面1aの中央部に上記第1,第
２実施例と同様な凸起部2cが設けられているとともに、
この凸起部2aを囲むように、この凸起部2aの高さと等し
く、かつ断面台形のリング状の凸起部2dが設けられてい
る。 上記第2,第３の実施例に係る各凸起部2a〜2dの配置は、
上記第１の実施例と同様に上面1aに車輪Ｗが落下しない
ように配置されるが、特に、これら第2,第３の実施例の
ように複数の凸起部が設けられたときは、直径の小さい
車輪でも確実に落下を防止することができる。 なお、上述の各実施例では、凸起部の平面形状を円形ま
たはリング状としたが、平面形状が四角または多角形で
もよく、例えば、各市町村のシンボルマークを凸起部と
することもできる。Hereinafter, a lid according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a lid according to the first embodiment, FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a plan view thereof. The lid 1 is a cast iron lid for a round manhole, and its upper surface 1a
A protrusion 2 having a trapezoidal cross section and a circular plane is integrally formed in the center of the. The height of the raised portion 2 is set to be equal to or slightly lower than the road surface G when the lid 1 is fitted to the frame body 10. For example, if the upper surface 1a is 3 cm lower than the road surface G, the height of the raised portion 2 is 2.5 cm, and the upper surface 1a is
If is lower than the road surface G by 2 cm, the height of the raised portion 2 is set to 1.5 cm. The arrangement of the raised portion 2 with respect to the upper surface 1a is such that when a portion of the wheel W of the automobile is located on the road surface G, another portion of the wheel W is located on the raised portion 2 (of the wheel W). Partly raised part 2
The other part of the wheel W is located on the road surface G when the vehicle is located at. In short, the wheels W have a positional relationship such that they do not come into contact with the road surface G and the raised portions 2 and never come into contact with the upper surface 1a. According to the research conducted by the present inventor, the above-mentioned arrangement relationship indicates that when the diameter D of the lid 1 is 600φ and the diameter of the protrusion 2 provided at the center of the upper surface 1a is at least 300φ, the wheel of a normal passenger car Has been found to be able to pass over the lid 1 without falling onto the upper surface 1a. Of course, the wheels of a large-sized automobile having a diameter larger than that of an ordinary passenger car can pass without coming into contact with the upper surface 1a. Like the well-known lid, the side wall 1b of the lid 1 is formed into an inverted cone corresponding to the tapered opening 10a of the frame body 10, and a reinforcing rib 1c is integrally provided on the back surface of the lid 1. . The frame body 1 is made of cast iron and is fixed on a concrete base A provided in the ground of the road surface G, like the well-known frame body. Since the lid 1 according to the present embodiment is provided with the raised portion 2 in the central portion of the upper surface 1a, when a part of the wheel W is still located on the road surface G, another part of the wheel W is Since it can be received by the raised portion 2, the phenomenon that the wheel W drops onto the upper surface 1a is eliminated, and it is possible to prevent the occurrence of impact due to the fall. Further, since such an impact is prevented, the vibration of the automobile passing on the lid 1 is also suppressed, so that the secondary effect of improving the riding comfort can be obtained. Further, since the edge of the raised portion 2 is formed in a trapezoidal shape, for example, the road surface G is scraped by a spike tire or the like to be lowered,
Even if the grader of the snowplow comes into contact with the raised portion 2, the grader can be released upward, so that the lid 1 can be prevented from being damaged. In addition, since the edge of the raised portion 2 is trapezoidal, there is no risk of damaging the wheel W. 3 and 4 show a lid 1'according to the second embodiment, FIG. 3 is a plan view thereof, and FIG. 4 is a sectional view taken along the line IV-IV of FIG. The lid 1'according to this embodiment is provided with the same raised portion 2a as that of the first embodiment in the center of the upper surface 1a, and the raised portion 2a is surrounded by the raised portion 2a. Also, eight small-diameter raised portions 2b, 2b ... Are provided. 5 and 6 show a lid 1 ″ according to the third embodiment, FIG. 5 is a plan view thereof, and FIG. 6 is a sectional view taken along the line VI-VI of FIG. The lid 1 ″ according to the example is provided with the same raised portion 2c as in the first and second embodiments in the central portion of the upper surface 1a,
A ring-shaped protrusion 2d having a trapezoidal cross section and having a height equal to the height of the protrusion 2a is provided so as to surround the protrusion 2a. The arrangement of the protrusions 2a to 2d according to the second and third embodiments is as follows.
Similar to the first embodiment, the wheels W are arranged so as not to fall on the upper surface 1a. In particular, when a plurality of protrusions are provided as in the second and third embodiments, Even a wheel with a small diameter can be reliably prevented from falling. In addition, in each of the above-described embodiments, the planar shape of the raised portion is circular or ring-shaped, but the planar shape may be a square or a polygon, for example, the symbol mark of each municipality may be the raised portion. .
【考案の効果】 本考案に係る蓋は、上面に凸起部を設けたので、車輪の
一部がまだ路面に位置しているときにその車輪の他の一
部をその凸起部で受け止めることができるので、車輪が
上面に落下するという現象が無くなり、その落下に伴う
衝撃の発生を未然に防止することができる。 また、凸起部の縁が台形に形成されているときは、例
え、路面がスパイクタイヤ等で削られて低くなって除雪
車のグレーダが凸起部に当接しても、グレーダを上方へ
逃がすことができるので、蓋の破損を未然に防止するこ
とができる。EFFECTS OF THE INVENTION Since the lid according to the present invention is provided with the protrusion on the upper surface, when the portion of the wheel is still located on the road surface, the other portion of the wheel is received by the protrusion. As a result, the phenomenon that the wheels fall to the upper surface is eliminated, and it is possible to prevent the occurrence of impact due to the fall. Also, when the edge of the raised portion is trapezoidal, even if the road surface is scraped by spike tires etc. and becomes low and the grader of the snow remover comes into contact with the raised portion, the grader escapes upward. Therefore, it is possible to prevent the lid from being damaged.
【図面の簡単な説明】 第１図及び第２図は本考案の第１の実施例に係る蓋であ
って、第１図はその縦断面図、第２図は第１図の平面
図、第３図及び第４図は第２の実施例に係る蓋であっ
て、第３図はその平面図、第４図は第３図のIV-IV線断
面図、第５図及び第６図は第３の実施例に係る蓋であっ
て、第５図はその平面図、第６図は第５図のVI-VI線断
面図である。 1,1′,1″……蓋（マンホール用蓋）、2,2a〜2d……凸
起部、10……枠体（マンホール枠体）、Ｇ……路面、Ｗ
……車輪。BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 show a lid according to a first embodiment of the present invention, wherein FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a plan view of FIG. 3 and 4 show a lid according to the second embodiment, FIG. 3 is a plan view thereof, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, FIG. 5 and FIG. Is a lid according to the third embodiment, FIG. 5 is a plan view thereof, and FIG. 6 is a sectional view taken along the line VI-VI of FIG. 1,1 ′, 1 ″ …… Lid (lid for manhole), 2,2a to 2d …… Projection, 10 …… Frame (manhole frame), G …… Road surface, W
……Wheel.
Claims (2)
蓋の上面が路面よりも低い位置となるように用いられる
マンホール用蓋であって、 前記マンホール用蓋の上面に、前記路面を通過する自動
車の車輪の一部がその路面にあるときにその車輪の他の
一部を受け止めることのできるその路面とほぼ等しい高
さを有する凸起部を設けたことを特徴とするマンホール
用蓋。1. A manhole cover used in such a manner that an upper surface of a manhole cover fitted to a manhole frame is located at a position lower than a road surface, the manhole cover passing through the road surface. A lid for a manhole, characterized in that it is provided with a raised portion having a height substantially equal to that of a road surface capable of receiving the other part of the wheel of the automobile when the part of the wheel is on the road surface.
とを特徴とする請求項１記載のマンホール用蓋。2. The manhole cover according to claim 1, wherein the protrusion has a trapezoidal cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5520490U JPH0730761Y2 (en) | 1990-05-26 | 1990-05-26 | Manhole cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5520490U JPH0730761Y2 (en) | 1990-05-26 | 1990-05-26 | Manhole cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0415636U JPH0415636U (en) | 1992-02-07 |
| JPH0730761Y2 true JPH0730761Y2 (en) | 1995-07-19 |
Family
ID=31577947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5520490U Expired - Fee Related JPH0730761Y2 (en) | 1990-05-26 | 1990-05-26 | Manhole cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730761Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6752162B2 (en) * | 2017-02-08 | 2020-09-09 | 鹿島建設株式会社 | Umbrella body for shaft and backfill method around shaft |
-
1990
- 1990-05-26 JP JP5520490U patent/JPH0730761Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0415636U (en) | 1992-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |